Tyson Fury is a fighting man - that is no secret nor should it be a surprise.
He has one ambition and one ambition only this summer and that is to become the first undisputed heavyweight champion since Lennox Lewis in 1999.
The "Gypsy King" is expected to face British rival Anthony Joshua with all four major world titles on the line with August 14 a potential date for the clash.
Fury - who destroyed Deontay Wilder last year to claim the WBC version - is in Texas to support Billy Joe Saunders' unification bout against Saul 'Canelo' Alvarez.
The 32-year-old has been taking part in some sparring this week and Jamie Sheldon - Saunders' cutman tomorrow night at the AT&T Stadium - was left in awe of the 32-year-old, who he described as a 'freak' of nature.
"He said, we'll do 10 rounds. So after the first round he had sparred for three minutes and then we stopped for a minute," he exclusively told Planet Sport.
"Second round, we stop for 30 seconds and he says these breaks are too long.
"After the second round, he turns around and says 'I'm not having a break, let's just leave it.'
"Twenty-five to 30 rounds later and he never had a drink either in all that time - 25 to 30 rounds later he just went to everybody, 'right I'm done, I'm going to finish on the heavy bag, can I have a drink please?'
"Honestly, it was unbelievable and he finished as light on his feet as he started which I thought was freaky and seeing him up close, seeing a man his size and stature throwing a double jab as fast as he did - blown away.
"I respected him before as a fighter and I appreciated how good he was but it's gone through the roof seeing him up close.
"I was in awe of the fella, absolutely ridiculous," Sheldon concluded.